若y=sinx是减函数，y=cosx是增函数，则角x所在的象限是（）.

A．第一象限

B．第二象限

C．第三象限

D．第四象限

根据句意及首字母或汉语提示，补全单词。

小题1:Mrs. Green often goes to the m__________ to buy some vegetables.

小题2:Tom is very sad. His little dog has been d___________.

小题3:It’s impolite to d__________ others while they are sleeping.

小题4:China has developed __________ (迅速地) in the past ten years.

小题5:__________ (虽然) there were many difficulties, they didn’t give up.